Core Java Developer Interview Questions and Answers

I am interested in Java because of its versatility, performance, and widespread use in the industry.

• Java is a versatile programming language that can be used for a wide range of applications, from web development to mobile app development.

• Java is known for its performance and scalability, making it suitable for building high-performance and robust applications.

• Java has a large and active community, with a vast amount of resources and libraries available for developers.

• Java is...read more

Object is an instance of a class that encapsulates data and behavior.

• An object is created from a class using the 'new' keyword

• Objects have state and behavior

• State is represented by instance variables and behavior is represented by methods

• Objects can interact with each other through method calls

• Objects can be passed as arguments to methods and returned from methods

Java is a high-level, object-oriented programming language used for developing a wide range of applications.

• Java is platform-independent, meaning it can run on any operating system.

• It is known for its simplicity, readability, and robustness.

• Java uses a virtual machine (JVM) to execute code, providing portability.

• It supports multithreading, allowing concurrent execution of multiple tasks.

• Java has a vast standard library and a large community for support and resources.

Inheritance in Java allows a class to inherit properties and behavior from another class.

• Inheritance is achieved using the 'extends' keyword in Java.

• Subclasses inherit fields and methods from their superclass.

• Java does not support multiple inheritance, but a class can implement multiple interfaces.

• Example: class Dog extends Animal {}